Antifriction-slide for extension-tables.



B. H. GARNOVSKY.

ANTIFRIGTION SLIDE FOR EXTENSION TABLES.

APPLICATION FILED 00T.21, 1911.

Patented Apr. 1, 1913.

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1 UNITED sraans 1 ATENT OFFICE.

BYRON H. CARNOVSKY, 015 DETROIT, MICHIGAN.

ANTIFRICTION-SLIDE FOR EXTENSION-TABLES.

T 0 all whom it may concern Be it known that I, BYRON H. CARNovsKY, who am a citizen of the United States, residing at Detroit, WVayne county, Michigan, have invented a certain new and useful Improvement in Antifriction-Slides for Extension-Tables, and declare the following to be a full, clear, and exact description of the same, such as will enable others skilled in the art to which it pertains to make and use the same, reference being had to the accompanying drawings, which form a part of this specification.

The invention relates to anti-friction slides for extension tables, and has for its object an improved device of this ty'pefi adapted to greatly reduce, if not entirely ."prevent, the

objectionable binding and lack of slidability: between the lengthwise frame pieces, which; so often makes the lengthening or shorten-i ing of an extension table, which employs extra, removable leaves, a matter ofiso much difliculty and effort.

In the drawings :Figure 1 is an elevation, partly in section, showing the relative position of the parts of two adjacent slides and their attached metal parts. Fig. 2 is an elevation, largely in section, at right angles to that of Fig. 1, along the line a.a thereof. Fig. 3 is a sectional elevation along the line ?2Z of Fig. 1. Fig. 4 is a perspective, showing one, of the metal facings for the slide pieces and one of the bearing rollers. Fig. 5 is a sectional plan view, of the slide pieces with the table leaves removed and some of the interior parts shown in dotted lines.

A and B represent a pair of slide pieces of an extension table, on whose top are adapted to rest the leaves C. In the cut away por tions E and F of their adjacent lateral faces are secured, by screws or pins, metal track pieces D and Q, the upper and lower edge of which are bent over so that cross-sectionally it resembles a hook at each edge. The tips of these hooked edgeportions G engage in valleys or grooves H and J in the periphery of the spools or rollers K, of which there are preferably two between each slide piece, so spaced from one another in the first instance that when the table is drawn out to its maximum extent they will be sutficiently apart from one another, and their adjacent track pieces D and Q on either side will overlap sufficiently, to maintain the com- Specification of Letters Patent.

Application filed October 21, 19-11.

Patented Apr. 1, 1913.

Serial No. 655,829.

' pound slide piece composed of the parts A and B in desired rigidity of alinement. Between and on each side of these valley portions H and J on the roller are located the ribs or ridges M N and P. The central ridge N, while not absolutely essential, serves to keep the track pieces D and Q, from frictional engagement with one another along their bent over edge portions G. The pulling of the slide members too far apart may be prevented by suitably placing stop members or pins that need not be here illustrated.

While I have illustrated a device wherein the sides of the slide pieces are grooved, as at E and F, to neatly and compactly receive the track pieces, it is obvious that the principle herein disclosed could be used advanta- 'geously if the track pieces were placed on ithe plane, unfurrowed sides of slide pieces, though the completed article would lack the finished, compact appearance here attained. Similarly, slight changes in the form of the track pieces or roller, without departing from the spirit of my invention, are possible.

What I claim is 1. In an extension table, the combination of a plurality of longitudinal frame pieces arranged in closely adjacent parallel relationand capable of relative lengthwise movement, the opposing lateral faces of said pieces being complementarily grooved, metal track pieces whose central portions are attached to the faces of said grooves, and whose top and bottom edges are bent over so as to lie opposite to one another in sub stantially the same vertical plane as the lateral faces of said frame pieces above and below said grooved portions, and roller members whose peripheral faces are in the form of a plurality of alternating annular ridges and grooves, between and within which said bent over top and bottom edges of the metal track pieces engage, thereby slidably correlating the several frame pleces in positions tive lateral faces thereof, and plurally pable of relative lengthwise movement, sub

grooved roller members interposed between stantially as described. 10 the several track pieces as thus arranged, In testimony whereof, I sign this specifi- With their encircling ridges at each end encation in the presence of two Witnesses. gaged by the overengaging edges of the BYRON H. CARNOVSKY. metal track pieces, thereby holding said Witnesses:

frame pieces against sidewise movement WILLIAM M. SWAN,

away from one another, though slidably ca- JEFFERSON Gr. THURBER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, D. G. 

